How do you save, or make check points using the blender game engine?
==> https://drive.google.com/open?id=1ErvI2CB8UUhBa_-L1dVRnI_3jPoX93rF   &lt;==

above is simple system example of save 'n load system (saves to text in your computer).
it's pretty simple when near sensor is triggered it's automatically saving if you want it to be manual add keyboard sensor and if you want to make limited amount of saves, add an property sensor(which decrease with each save) and so on and so forth . logic is pretty basic . Feel free to study and use the example blend file.